The development of cleanrooms is closely linked to modern industry cutting-edge technology. Due to the precision machinery industry (such as gyroscopes, miniature bearings other processing), the semiconductor industry (such as large-scale integrated circuit production) other environmental requirements, promoting the development of clean room technology. Domestic had statistics, in the absence of clean level requirements of the environment under the production of MOS circuit core pass rate of only 10% ~ 15%, 64 for the storage device only 2%. Currently in the precision machinery, semiconductor, aerospace, atomic energy other industries in the application of clean room has been quite common.